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M 20 - NGC 6514 - Trifid Nebula  (image down sampled 0.4x, click on image for full size)
Sagittarius
Penryn, California
June 2007/August 2008
M 250 @ f 9.3 (ag, ST-4)
ST-10XME LRGB 5 minute subs

M 20 was first observed by LeGentile in 1747 and rediscovered by Messier in June 1764.  The Trifid is at approximately 6000 light years (Burham).

M 20 is a young HII star forming region with many protostars undergoing violent mass ejections. (Rho, et.al.).